Provided is a cube set operating based on short-distance wireless communication and a method and system for recognizing a cube pattern using the same. The cube set includes a plurality of cubes having different patterns formed on faces and a cube case in which a plurality of partition spaces where the plurality of cubes is respectively seated has been formed. One or more magnetic bodies are formed in at least some of the faces of the cube, and a plurality of magnetic sensors is formed in each of the partition spaces of the cube case.

A three-dimensional object for use as a puzzle, has a plurality of faces, each face having a locations and numbers at each location. Some of the numbers are replaceably removable, remaining numbers being fixed, and a predetermined rule links all of said numbers on the different faces to enable correct replacement of the removed numbers to solve said puzzle.

A sensing device, a ball shaft for smart magic cube, and a smart magic cube are provided. By optimizing the sensing device of the smart magic cube, only two circuit boards are needed to sense rotation states in six directions, thereby changing a current technology that requires setting PCB boards and sensors in each direction of the smart magic cube. The smart magic cube has a simple structure and is easy to assemble, which may reduce production costs.

A sphere puzzle having a plurality of sliding blocks, a series of protrusions, and first rails. The sliding blocks move in a double row along rings on tracks through the necks and under the bottom surfaces of second rails and stay fixed in their correct position with the help of a sliding ball on dents of the rings. A missing block enables movements with a large number of combinations, in order to complete required designs on the sphere surface.

A multi-axis rotational puzzle cube has a core unit and multiple first operating assemblies and multiple second operating assemblies rotatably assembled to the core unit. Each one of the multiple first operating assemblies has a first operating unit connected to the core unit, a snap rivet connected to the first operating unit inside the core unit, a blocking tube mounted around and stuck with the snap rivet, and a compression spring mounted around the snap rivet and abutting against the core unit and the blocking tube simultaneously. Each one of the multiple second operating assemblies has a second operating unit connected to the core unit, a snap rivet connected to the second operating unit inside the core unit, a blocking tube mounted around and stuck with the snap rivet, and a compression spring mounted around the snap rivet and abutting against the core unit and the blocking tube simultaneously.

A smart puzzle cube having prompting and recording functions includes at least four cubes (101), a central sphere body (4), and at least one conductive connector (8). The cubes (101) and the central sphere body (4) are securely connected by the conductive connector (8) via a mechanical connection, the cubes (101) are structurally connected to each other and rotatable, and puzzle cube layers formed by the cubes (101) rotate in both directions without limit. The conductive connector (8) includes a rotation detection module (10) that detects rotation directions and angles of the puzzle cube layers.

A sensing device, a ball shaft for smart magic cube, and a smart magic cube are provided. By optimizing the sensing device of the smart magic cube, only two circuit boards are needed to sense rotation states in six directions, thereby changing a current technology that requires setting PCB boards and sensors in each direction of the smart magic cube. The smart magic cube has a simple structure and is easy to assemble, which may reduce production costs.